FIELD: development of oil deposits, in particular, extraction of high-viscosity oil by exposing bed to thermal effects.
SUBSTANCE: method involves drilling vertical well; lowering and cementing operating column followed by perforation process; lowering pump-and-compressor pipes and bull pump; hermetically sealing cavity outside pipe by, for example, packer; injecting heat-carrier into well; extracting oil; providing short-wall of vertical well shaft below oil bed bottom so as to form hermetically sealed cement sleeve; drilling side shaft from vertical shaft, with side shaft mouth being arranged above oil-bearing bed roof and its short-wall above water-oil interface; casing side shaft with non-cemented slit-shaped shank; injecting heat-carrier into side shaft; extracting oil from well vertical shaft by means of bull pump mounted on face.
EFFECT: increased oil yield owing to increased steam injection rate and improved bull pump operating conditions during working of weakly cemented low-pressure productive beds in case of availability of water-bearing bed.
3 cl, 2 dwg, 1 ex
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